Photos

A picture taken on December 9, 2016 shows smoke rising from the chimney of an oil refinery, through a haze of pollution, south of Lyon.
The city of Lyon introduced an alternate traffic circulation from December 9, 2016, to reduce the pollution from fine particles. The surge in pollution has been driven by cold weather and near windless conditions that have trapped exhaust fumes, smoke from wood fires and other pollutants. / AFP PHOTO / JEAN-PHILIPPE KSIAZEKJEAN-PHILIPPE KSIAZEK/AFP/Getty Images